Perhaps you should try some spelling variations:
"and computation using covering problem" » "and computations using covering problem" (Expand search), "and computation in covering problem" (Expand search), "and composition using covering problem" (Expand search), "and computation using routing problem" (Expand search), "and computation using loading problem" (Expand search), "and computational using covering problem" (Expand search), "of computation using covering problem" (Expand search), "and computation ring covering problem" (Expand search), "and computation using competing problem" (Expand search), "and computation using covariant problem" (Expand search)
"using coding python python programming" » "using codigo python python programming" (Expand search), "using codigos python python programming" (Expand search), "using using python python programming" (Expand search), "using coding pythons python programming" (Expand search), "using coding piton python programming" (Expand search), "using coding pitons python programming" (Expand search), "using coping python python programming" (Expand search), "using coating python python programming" (Expand search), "using cooking python python programming" (Expand search)

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"and computation using covering problem\") OR (\"using coding python python programming\"))~".
• Removing quotes may allow a broader search: (( and computation using covering problem ) OR ( using coding python python programming ))~.
• Adding a wildcard symbol may retrieve word variants: (("and computation using covering problem") OR ("using coding python python programming"))*.